content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2012, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
   * Other names may be trademarks of their respective owners.]
   *
   * ------------------------
   * ImageEncoderFactory.java
   * ------------------------
   * (C) Copyright 2004-2012, by Richard Atkinson and Contributors.
   *
   * Original Author:  Richard Atkinson;
   * Contributor(s):   David Gilbert (for Object Refinery Limited);
   *
   * Changes
   * -------
   * 01-Aug-2004 : Initial version (RA);
   * 01-Nov-2005 : Now using ImageIO for JPEG encoding, so we no longer have a
   *               dependency on com.sun.* which isn't available on all
   *               implementations (DG);
   * 02-Feb-2007 : Removed author tags all over JFreeChart sources (DG);
   *
   */
  
  package org.jfree.chart.encoders;
  
  import java.util.HashMap;
  
  /**
   * Factory class for returning {@link ImageEncoder}s for different
   * {@link ImageFormat}s.
   */
  public class ImageEncoderFactory {
  
      /** Storage for the encoders. */
      private static HashMap<String, String> encoders = null;
  
      static {
          init();
      }
  
      /**
       * Sets up default encoders (uses Sun PNG Encoder if JDK 1.4+ and the
       * SunPNGEncoderAdapter class is available).
       */
      private static void init() {
          encoders = new HashMap<String, String>();
          encoders.put("jpeg", "org.jfree.chart.encoders.SunJPEGEncoderAdapter");
          encoders.put("png", "org.jfree.chart.encoders.SunPNGEncoderAdapter");
      }
  
      /**
       * Used to set additional encoders or replace default ones.
       *
       * @param format  The image format name.
       * @param imageEncoderClassName  The name of the ImageEncoder class.
       */
      public static void setImageEncoder(String format,
                                         String imageEncoderClassName) {
          encoders.put(format, imageEncoderClassName);
      }
  
      /**
       * Used to retrieve an ImageEncoder for a specific image format.
       *
       * @param format  The image format required.
       *
       * @return The ImageEncoder or <code>null</code> if none available.
       */
      public static ImageEncoder newInstance(String format) {
          ImageEncoder imageEncoder = null;
          String className = encoders.get(format);
          if (className == null) {
              throw new IllegalArgumentException("Unsupported image format - "
                      + format);
          }
          try {
              Class imageEncoderClass = Class.forName(className);
              imageEncoder = (ImageEncoder) imageEncoderClass.newInstance();
          }
          catch (Exception e) {
              throw new IllegalArgumentException(e.toString());
          }
          return imageEncoder;
      }
  
      /**
       * Used to retrieve an ImageEncoder for a specific image format.
       *
       * @param format  The image format required.
       * @param quality  The quality to be set before returning.
       *
       * @return The ImageEncoder or <code>null</code> if none available.
       */
      public static ImageEncoder newInstance(String format, float quality) {
          ImageEncoder imageEncoder = newInstance(format);
          imageEncoder.setQuality(quality);
          return imageEncoder;
      }
  
      /**
       * Used to retrieve an ImageEncoder for a specific image format.
       *
       * @param format  The image format required.
       * @param encodingAlpha  Sets whether alpha transparency should be encoded.
       *
       * @return The ImageEncoder or <code>null</code> if none available.
       */
      public static ImageEncoder newInstance(String format,
                                             boolean encodingAlpha) {
          ImageEncoder imageEncoder = newInstance(format);
          imageEncoder.setEncodingAlpha(encodingAlpha);
          return imageEncoder;
      }
  
      /**
       * Used to retrieve an ImageEncoder for a specific image format.
       *
       * @param format  The image format required.
       * @param quality  The quality to be set before returning.
       * @param encodingAlpha  Sets whether alpha transparency should be encoded.
       *
       * @return The ImageEncoder or <code>null</code> if none available.
       */
      public static ImageEncoder newInstance(String format, float quality,
                                             boolean encodingAlpha) {
          ImageEncoder imageEncoder = newInstance(format);
          imageEncoder.setQuality(quality);
          imageEncoder.setEncodingAlpha(encodingAlpha);
          return imageEncoder;
      }
  
  }
  